公开(公告)号：US10453610B2

公开(公告)日：2019-10-22

申请号：US15728568

申请日：2017-10-10

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Daiki Fukunaga

IPC: H01G4/30 ,  H01G4/12 ,  H01G4/248

Abstract: A multilayer ceramic capacitor with improved moisture resistance includes a laminate in which dielectric ceramic layers and internal electrodes are alternately stacked, and a pair of external electrodes provided on corresponding outer portions of the laminate. Each dielectric ceramic layer positioned between the internal electrodes, a first region positioned between the internal electrode and a first side surface in a width direction, and a second region positioned between the internal electrode and a second side surface, contains a perovskite compound containing Ba and Ti, and at least one element selected from a group consisting of Ba, Mg, Mn and a rare-earth element. Relationships S1

公开(公告)号：US10361034B2

公开(公告)日：2019-07-23

申请号：US16199546

申请日：2018-11-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Hideaki Tanaka ,  Daiki Fukunaga ,  Koji Moriyama

IPC: H01G4/30 ,  H01G4/005 ,  H01G4/232 ,  H01G4/12

Abstract: A multilayer ceramic capacitor includes a laminated body and first and second external electrodes respectively on both end surfaces of the laminated body. When regions where first internal electrodes or second internal electrodes are not present are regarded as side margin portions in a cross section of the laminated body as viewed from the laminating direction, the side margin portions include multiple side margin layers, and the content of Si in the side margin layer closest to the internal electrode is lower than that in the side margin layer other than the side margin layer closest to the internal electrode.

公开(公告)号：US09812261B2

公开(公告)日：2017-11-07

申请号：US15415989

申请日：2017-01-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Daiki Fukunaga ,  Hideaki Tanaka ,  Koji Moriyama

IPC: H01G4/30 ,  H01G4/012 ,  H01G4/12 ,  H01G4/248

CPC classification number: H01G4/30 ,  H01G4/005 ,  H01G4/012 ,  H01G4/1218 ,  H01G4/1227 ,  H01G4/248

Abstract: A multilayer ceramic capacitor includes a ceramic body and external electrodes provided on opposite end surfaces of the ceramic body. The ceramic body includes an inner layer portion including a plurality of ceramic layers defining inner layers and a plurality of first and second internal electrodes each disposed at an interface of adjacent ones of the ceramic layers defining the inner layers, outer layer portions sandwiching the inner layer portion in a direction in which the layers are stacked, and side margin portions sandwiching the inner layer portion and the outer layer portions in a widthwise direction. The side margin portion includes pores that decrease in number along a direction from inside to outside of the ceramic body.

公开(公告)号：US09633788B2

公开(公告)日：2017-04-25

申请号：US14711975

申请日：2015-05-14

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Daiki Fukunaga ,  Hideaki Tanaka ,  Koji Moriyama

IPC: H01G4/012 ,  H01G4/30 ,  H01G4/12 ,  H01G4/248 ,  H01G4/005

CPC classification number: H01G4/30 ,  H01G4/005 ,  H01G4/012 ,  H01G4/1218 ,  H01G4/1227 ,  H01G4/248

Abstract: A multilayer ceramic capacitor includes a ceramic body and external electrodes provided on opposite end surfaces of the ceramic body. The ceramic body includes an inner layer portion including a plurality of ceramic layers defining inner layers and a plurality of first and second internal electrodes each disposed at an interface of adjacent ones of the ceramic layers defining the inner layers, outer layer portions sandwiching the inner layer portion in a direction in which the layers are stacked, and side margin portions sandwiching the inner layer portion and the outer layer portions in a widthwise direction. The side margin portion includes pores that decrease in number along a direction from inside to outside of the ceramic body.

公开(公告)号：US09328026B2

公开(公告)日：2016-05-03

申请号：US14140741

申请日：2013-12-26

Applicant: Murata Manufacturing Co., Ltd.

Inventor： Kenichi Okajima ,  Daiki Fukunaga ,  Takayuki Yao ,  Yasunari Nakamura ,  Akihiro Shiota

IPC: C04B37/00 ,  H01G4/30 ,  H01G4/12 ,  B32B18/00

CPC classification number: C04B37/001 ,  B32B18/00 ,  C04B2237/346 ,  C04B2237/58 ,  C04B2237/704 ,  C04B2237/80 ,  H01G4/1227 ,  H01G4/1281 ,  H01G4/30 ,  Y10T29/43

Abstract: A raw ceramic portion is formed on each of first and second lateral surfaces of a raw ceramic body. The raw ceramic portions contain ceramic particles and more of at least one constituent selected from Ba, Mg, Mn, and a rare-earth element between the ceramic particles than the ceramic section of the raw ceramic body in terms of total amount. The raw ceramic body is fired with the raw ceramic portions thereon. In this way, a ceramic electronic component is obtained that has a main body left after the raw ceramic body is fired with the raw ceramic portions thereon.

Abstract translation: 原料陶瓷部分形成在原料陶瓷体的第一和第二侧表面的每一个上。 原料陶瓷部分在陶瓷颗粒之外含有陶瓷颗粒和更多的选自Ba，Mg，Mn和稀土元素中的至少一种，而不是陶瓷颗粒的总量的陶瓷部分。 原料陶瓷体在其上被烧制。 以这种方式，获得陶瓷电子部件，其中在原料陶瓷体被烧制之后留下的主体在其上留下。